Danny Greefhorst, vrijdag 27 februari 2009

SABSA is a model and a methodology for developing risk-driven enterprise information security architectures and for delivering security infrastructure solutions that support critical business initiatives.  The primary characteristic of the SABSA model is that everything must be derived from an analysis of the business requirements for security, especially those in which security has an enabling function through which new business opportunities can be developed and exploited. 

The process analyses the business requirements at the outset, and creates a chain of traceability through the strategy and concept, design, implementation, and ongoing ‘manage and measure’ phases of the lifecycle to ensure that the business mandate is preserved.  Framework tools created from practical experience further support the whole methodology.  

The model is layered, with the top layer being the business requirements definition stage.  At each lower layer a new level of abstraction and detail is developed, going through the definition of the conceptual architecture, logical services architecture, physical infrastructure architecture and finally at the lowest layer, the selection of technologies and products (component architecture). 

The SABSA model itself is generic and can be the starting point for any organisation, but by going through the process of analysis and decision-making implied by its structure, it becomes specific to the enterprise, and is finally highly customised to a unique business model.  It becomes in reality the enterprise security architecture, and it is central to the success of a strategic programme of information security management within the organisation.

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